Presentation on theme: "Communication With a High Altitude Balloon Team HAB-Comm: Ryan OvermanBrian Thomas Thomas RawlsTrenton Katter."— Presentation transcript:
Communication With a High Altitude Balloon Team HAB-Comm: Ryan OvermanBrian Thomas Thomas RawlsTrenton Katter
Agenda Introduction – Thomas Rawls Background – Trenton Katter Challenges and Proposed Solutions – Ryan Overman Schedule and Resources – Brian Thomas Summary – Thomas Rawls Questions
Background WSU’s High Altitude Balloon project: – Began in 2005 and has received funding through NASA, AFRL, the National Science Foundation, and the Ohio Space Grant Consortium. – It is multi-disciplinary. – It is interested in studying near-space and its potential applications.
What is “Near-Space?” Near-space is a region of our atmosphere between 65,000 and 350,000 ft. The air is thin, dry, and cold.
Previous Groups Have: Previous Successes include: o A controlled ground antenna. o Ability to transmit video from air-to- ground. o Development of a Software Defined Radio system that can be used for air-to-ground communication. o Others
Our Objective To develop a reliable ground-to-air communication system and demonstrate its functionality by releasing a package on command.
Can a High Altitude Balloon serve as an emergency communications platform?
Our Scope Our scope does NOT include: - integrating the two communication systems. - designing the release mechanism. - responsibility for steering the ground antenna. Our scope is limited to: - designing the electronics to reliably receive a signal at the balloon at a height of 100,000 ft. and a radius of 100 miles.
Approach Licensed Ham Operation – Each member of HAB-Comm capable of operating radio transmission Ground test – 1 mile transmission at 4kbps with line of sight – Calculate theoretical power for implementation Launch balloon
Challenges Noise – Spectrum analysis from balloon in near-space – Frequency hopping communication system – Device on balloon selects quiet frequency, transmits accordingly – Balloon antenna modification possibility Temperature – Select previously-tested electronic components
Results Reliable Ground-to-air communication system installed – Allows future ME and EE teams to install control systems on the balloon – Future implementation of an integrated two-way communication device Significant step towards emergency system implementation
Personnel HAB-Comm is comprised of 4 undergraduate electrical engineering students with varied background. Multiple Wright State University Professors as consultants: Dr. Wu (EE), Dr. Slater (ME), Dr. Gallagher (CEG)
Facilities and Equipment HIBAL Laboratory located in Russ 018 Transmit/Receive Antenna on the roof of Russ Python/Linux based PCs 50 W Power Supply of transmitting Wiki Page running for 8 years documenting all previous launches
Time Frame Research and selection of electronic components –Sept 27 th, 2013 Design and test transmitter/receiver combo – Nov 15 th, 2013 Deliver a status report – Dec 6 th, 2013 Communication device on balloon and launched – Jan 31 st, 2014 Reconfigure device and second launch – March 16 th, 2014 Deliver final presentation with results – April 21 st, 2014
Design Considerations To develop a system that operates amidst ambient noise and extremely low temperatures. Investigation: – Clever filter design – Power amplification – Frequency hopping – Utilization of the air to ground communication – Antenna design/control
Summary Develop reliable communication system – Possible control of the release of the package Implement a cost effective system – Cheap, reliable emergency communication system Aid future HIBAL groups